Jewel: DataGrid HScrollBar

Although the DataGrid element automatically shows the VScroll, when its content exceeds the size of the control, there is no way (at least I have not been able to find it) to add an HScroll when the width of the control exceeds the size of our screen.

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Our current "solution" is to use an HGroup and add the HScroll by style:
style = "overflow: scroll; overflow-y: hidden;"

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